Grotte di Bigues i Riells

Bigues i Riells, a municipality in the Vallès Oriental, has 5 catalogued cavities: 4 caves and 1 pit. The total recorded passage is 213 m and the maximum depth is 22 m. The lithologies present are sandstones (2), travertines (2) and limestones (1).

The longest cavity is the Cova del Bon Pastor, at 120 m, known in the tosques of Sant Miquel del Fai and also called Cova de Sant Martí, with access via the tourist itinerary of the site. It is followed by the Cova de Sant Miquel del Fai, at 60 m, a small tourist cave with a single illuminated gallery and a small pool at the end; the l'Avencó de Bigues, a spring with 15 m of passage, 9 m of which are traversed by water; the Balma Rosa, at 14 m, a large rock shelter in the Sant Miquel del Fai natural area; and the Forat de la Baga de Can Torrela, at 4 m.

The Forat de la Baga de Can Torrela was explored on 26 July 1897 by Norbert Font i Sagué and the Maspons Angladell brothers, Pere Pagès and Maspons Camarasa, who descended 13 m through a narrow fissure; it is currently collapsed at -1.45 m. The Cova del Bon Pastor is also the deepest, at 22 m.